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CUSTOM AT COMMANDS

105 AT Commands for EV-DO-EV3 Modems

General Purpose Input/Output Pin Control #GPIO

Execute command sets the value of the general purpose output pin GPIO<pin> according to <dir> and <mode>

parameter.

Not all configurations for the three parameters are valid.

Read command reports the read direction and value of all GPIO pins, in the format:

#GPIO: <dir>,<stat>[<CR><LF>#GPIO: <dir>,<stat>[…]]

where the sections that follow describe values for <dir> and <stat>.

Test command reports the supported range of values of the command parameters <pin>, <mode> and <dir>.

Syntax

Command Command type

AT#GPIO=[<pin>,<mode>[,<dir>]]

Execute

AT#GPIO? Read

AT#GPIO=? Test

Parameters and Values

<pin> GPIO pin number. Range is from 1 to a value that depends on the hardware.

SocketModem supports GPIO0 to GPIO4.

MTPCIE-x supports GPIO0 to GPIO3.

<mode> <mode> - Meaning depends on <dir> setting:

0 No meaning if <dir>=0 - INPUT

- Output pin cleared to 0 (Low) if <dir>=1 - OUTPUT.

- No meaning if <dir>=2 - ALTERNATE FUNCTION .

1 No meaning if <dir>=0 - INPUT

- Output pin set to 1 (High) if <dir>=1 - OUTPUT.

- No meaning if <dir>=2 - ALTERNATE FUNCTION.

2 Reports the read value from the input pin if <dir>=0 - INPUT

- Reports the read value from the input pin if <dir>=1 - OUTPUT.

- Reports a no meaning value if <dir>=2 - ALTERNATE FUNCTION.

<dir> GPIO pin direction:

0 - pin direction is INPUT.

1 - pin direction is OUTPUT.

2 - pin direction is ALTERNATE FUNCTION. See Notes section.

Notes

 When <mode>=2 (and <dir> is omitted) the command reports the direction and value of pin GPIO<pin> in

the format:

#GPIO: <dir>,<stat>

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 248 249

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Multitech CDMA Guía de usuario Pagina 105